Week 7 - Solutions

Solutions to climate change.....  

Mitigation

Carbon emissions are a critical factor in the changing of our climate but how can we reduce these:

Use less energy

The world's primary energy consumption is 470 exajoules, which is every person, on average, is using over two kilowatts of power all day, every day. We can all reduce the amount of energy we use by switching off lights, insulating our houses and not wasting energy etc.

Use renewables

Move away from fossil fuels and use renewables instead such as wind, solar and tidal.
In the UK, renewable energy makes up around 11% of our generation capacity.

Adaption

Climate change is happening anyway as we have already pumped a lot of carbon dioxide into the atmosphere since the industrial revolution so we will need to adapt out build environments to cope with warmer temperatures, more extreme weather and changes in rainfall.

Design for comfort

Keeping cool inside - Hotter summers will affect the design of buildings the most. The thresholds of comfortable heat are 25 degrees C for bedrooms and 28 degrees C in other living areas. The key is to maximise comfort with minimal energy use which can be done through passive cooling or energy efficient active cooling systems. To cope with the warmer summer climate, technologies and techniques include:

• shading systems for both new build and the existing stock that could be progressively rolled out as circumstances change
• glazing and film technologies to improve the performance of glass in terms of solar exclusion
• the development of reflective solid materials to reflect heat off of building surfaces
• secure night-time ventilation systems to allow buildings to be purged of hot air whilst also excluding insects
• acoustically attenuated natural and mechanical ventilation systems to cope with conditions where external/internal noise is a problem
• more efficient cooling systems, exploiting building-based renewable technologies and/or improved groundwater and earth-coupled cooling systems
• improved cooling control systems to maintain comfortable conditions without using excessive energy
• affordable, safe, phase change materials to provide the performance of thermal mass without the weight associated with conventional materials – this is particularly relevant for prefabricated buildings, which tend to be lightweight. 

Keeping cool outside

• increasing shade
• Plant for drier summers using different plants or better irrigation methods
• increasing green spaces (parks and gardens) and blue spaces (rivers, ponds, lakes etc)

Keeping warm

• high levels of insulation
• creating a better system for hot water and space heating
• mechanical ventilation with heat recovery

Construction

We need to review the materials, techniques and fixings of our buildings to ensure they can withstand the extreme weather conditions.

• Ensure foundations are designed for the lifetime of the building
• underground pipework can withstand soil and stability changes
• better weatherproofing from driving rain and flood waters
• above ground stability improved
• using better materials that will last longer and take the impact

Managing Water


With the prospect of summer droughts, more frequent extreme rainfall and increased flooding, water management is becoming a serious challenge for the building industry.

Water conservation - Drinking water is increasingly becoming in short supply. Households will need to use systems so that rain water or grey water can be used for non potable uses. Creating water bodies within blue amenity areas to store or treat surface water.

Drainage - Larger capacity gutters, down pipes and drainage systems may be needed. Drains may be overwhelmed by heavy rainfall. Foul sewers may fail to function as we use less water.

Flooding - SUDS are a requirement of all new developments but these will need to be reviewed considering the soils ability to absorb and disperse surface water. Flash flooding and changing groundwater levels need to be considered in urban design.

Case Study

Example of a local building which has been constructed to cope with climate change.
Howe Dell School in Hatfield, Hertfordshire, UK

                                     

    

• a pioneering heating, cooling and ventilation system which captures renewable energy to warm or cool the building

• a wind turbine

• electricity producing photovoltaic panels

• roof lights and light wells which allow natural daylight to flood into the building, minimising the need for artificial lighting

• high-performance windows to reduce heat loss

• classroom sink tops and splash backs made from recycled yogurt pots

• 'living' sedum roof areas which help to insulate the building and promote bio-diversity

• a water recycling system

Howe Dell is Hertfordshire’s first ‘Eco-School’.  It is also the first building in the world to feature a revolutionary new heating system that uses the school playground to heat and cool its buildings. It also has many other eco features such as:

NIMBY conflicts

Renewable energy is being used to decarbonise the energy grid but there are issues when it comes to the technology and structures used to harness this energy.

The Not In My Back Yard (NIMBY) refers to those people who do not want these things in their local area or back yard as it's often referred to...they'd totally rather it be in someones's backyard tho!

Not my backyard? Is this really the problem when it comes to wind farms, surely they are miles away from peoples homes? However, even though off shore wind farms are not located in peoples back yard they are still receiving protests when new schemes for farms are being planned and getting complaints about existing farms.

There are two key things to understand about NIMBYism:
1) Procedural justice - issues of how people are told, and when they're told, and how much they're told, and how much of a say they have in any decision-making or governance process
2) Place attachement - refers to the kinds of emotional bonds that can develop between individuals and communities, and the particular places or landscapes or seascapes in which they live, and which are important to them.

Community benefits protocol

Community benefits schemes are a well established, integral part of onshore wind energy development, and represent a positive relationship between developers and communities.

With the aim of formalising the industry’s approach, RenewableUK first launched its Community Benefits Protocol in February 2011. As an industry led and government backed initiative, this protocol was the first of its kind to provide clear industry-wide commitments on community benefit provision. This Protocol was further updated in October 2013 in response to the DECC call for evidence into onshore wind, which concluded in June 2013. This Protocol is supported by DECC and a range of governmental and community stakeholders.

Under the Protocol, developers in England with qualifying projects commit to provide community benefits of £5,000 per MW of installed capacity, or equivalent benefits-in-kind, directly to host communities.

These funds can be used to finance anything the community deems appropriate and necessary for their areas, including community owned renewable energy projects, village halls, recreational facilities or equipment for local schools. Benefits under the Protocol are negotiated directly with host communities.

links:

http://www.arcc-network.org.uk/wordpress/wp-content/D4FC/01_Design-for-Future-Climate-Bill-Gething-report.pdf

http://www.theguardian.com/science/2013/nov/28/drink-local-the-climate-change-act-in-the-lake-district-rebecca-willis
http://www.renewableuk.com/en/renewable-energy/communities-and-energy/community-benefits-protocol/index.cfm